Indonemoura yangi Li & Yang

Li, Weihai & Yang, Ding, 2006, The genus Indonemoura Baumann, 1975 (Plecoptera: Nemouridae) from China, Zootaxa 1283, pp. 47-61 : 57-58

Indonemoura yangi Li & Yang , sp. nov.

( Figs. 47–53 )

Diagnosis. Tergum 9 weakly constricted medially. Epiproct constricted slightly medially, with weak apical incision and ventral ridge rather wide apically. Apical spines of outer lobe curved outward apically, the inner apical spine being single, while the outer apical spine is forked.

Male. Forewing 7.7 mm, hindwing 6.7 mm. Head ( Fig. 53 ) and compound eyes dark; antennae and mouthparts dark brown. Thorax dark brown, pronotum ( Fig. 53 ) dark brown with two arched, dark markings and a transverse groove on anterior margin; wings brown; legs brown, except tibiofemoral joint dark brown and femora with yellow bands at tip. Abdomen yellowish brown; hypoproct and cerci brown; hairs on abdomen mostly pale.

Terminalia ( Figs. 47–52 ): Tergum 9 weakly sclerotized, slightly constricted medially, with distinct mid­anterior incision, and with two groups of tiny spines at middle. Sternum 9 with slender vesicle; hypoproct rather wide basally, then distinctly tapering toward tip, fringed with tiny black spines. Tergum 10 mostly sclerotized except distinctly sclerotized bands obliquely across each side of tergum, and a deep median concavity, with two groups of tiny spines along antero­lateral margin of the concavity. Cercus slightly sclerotized, long and nearly cylindrical, with a black oval process at tip. Epiproct constricted at middle, with weak apical incision, with ventral sclerite strongly sclerotized, broad at base and becoming narrower toward apex, expanded ventrally into a very large semicircular ridge,, wide apically, fringed with distinct spines. Paraproct divided into three lobes: inner lobe pointed, distinctly sclerotized, adhering to large median lobe; median lobe mostly sclerotized, well developed, with two pointed denticles, and rather wide arch­like tip; outer lobe narrow, strongly sclerotized, distinctly recurved at middle, and with apical spines curved outward apically, the inner spine being single, while the outer spine is forked.

Female. Unknown.

Type Material. Holotype, male, CHINA: Guangxi, Huanjiang, Jiuwandashan Mountain, Jiuren, 950–1,150 m, 2003. VIII.3, L. Zhang.

Distribution. China (Guangxi).

Etymology. The species is named after Prof. Chi–kun Yang.

Remarks. The new species is very similar to Indonemoura baishanzuensis n. sp., but may be separated from the latter by the following features: epiproct constricted medially with weak apical incision and ventral ridge, wide apically; apical spines of outer lobe curved outward apically, inner spine single but outer apical spine forked; hypoproct with tiny apical spines at tip. In baishanzuensis , the epiproct is nearly parallel­sided in dorsal view with the distinct apical incision and the ventral ridge narrowing apically; the apical spines of the outer lobe are curved inward apically, of which the inner spine is forked but the outer spine is single; the hypoproct has no tiny apical spines.

Figures

FIGURES 47 – 53. Indonemoura yangi sp. nov. (male). 47. Genitalia, dorsal view. 48. Genitalia, ventral view. 49. Epiproct, dorsal view. 50. Epiproct, lateral view. 51. Right paraproct, caudal view. 52. Prongs of outer lobe, lateral view (left paraproct). 53. Head and pronotum, dorsal view.